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Charra
2 months ago
5

If R is the midpoint of QS, RS=2X-4, ST=4X-1, and RT=8X-43, find QS

Mathematics
1 answer:
zzz [12.3K]2 months ago
3 0
RT equals RS plus ST
8x - 43 = 2x - 4 + 4x - 1
Simplify: 8x - 43 = 6x - 5
Bring variables to one side: 8x - 6x = -5 + 43
2x = 38
Divide both sides by 2:
x = 19

Calculate QS as twice RS:
QS = 2 * RS = 2 * (2x - 4) = 2 * (2*19 - 4) = 2 * 34 = 68
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